Effect of Coding on the Jitter Accumulation in Baseband Digital Transmission

A method is presented to evaluate the effect of line codes on the timing jitter in a chain of PCM repeaters. The timing circuit in each regeneration section consists of a square-law device followed by a resonant circuit tuned to the transmission rate and by a zero-crossing detector. The analysis applies to a broad class of line codes. The results of the paper indicate that the influence of the code on the jitter accumulation is fairly marginal and that the jitter variance is maximum when the symbols are uncorrelated.